/usr/share/apps/kdm/themes/kubuntu does not exist after installing kdm

When installing ubuntu without X and after that installing wanted packages plus kdm (having the dependencies gdb, kdebase-bin and kdebase-data installed) you get a popup error about /usr/share/apps/kdm/themes/kubuntu not existing. You have to click this popup before you can login via kdm. Everything works fine otherwise.

The directory mentioned above is not created either by installing kde-kdm-themes. The easiest solution seems to be to edit /etc/kde3/kdm/kdmrc and change the line beginning with Theme to what should be the default according to the comment before that line:
Theme=

This will do the same effect as
UseTheme=false
but without the error popup.

Please either install the kubuntu theme with kdm as default or then have Theme defaulting to nothing if installing kdm alone.